Bruce, They use non-tinned non-marine grade wire in lots of boats. I don't know why the ground tends to corrode first. Make sure you are cutting off enough wire to get to wire that is not garbage. Don't buy connectors at an automotive store. Speaker wire is likely garbage from end to end. You can't test impedance by checking voltage. Learned that one the hard way!
Joel On Wed, Jul 19, 2017 at 9:53 AM, Dennis C. via CnC-List < cnc-list@cnc-list.com> wrote: > I hope you're coating your connections with TefGel as you fix them. :) > > Dennis C. > Touche' 35-1 #83 > Mandeville, LA > > On Wed, Jul 19, 2017 at 8:49 AM, Bruce Whitmore via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Hello, >> >> We took over ownership of a 1994 C&C 37/40+ about 4 months ago. At that >> time, we knew we had a battery issue. As it turns out, after we replaced >> the batteries, we found that one of the battery banks was still not showing >> enough voltage getting to the panel. I immediately suspected a bad ground, >> and when I went to tighten it, the ground cable made a crunching sound/feel >> when I pulled on it. >> >> I immediately replaced the ground cables, which fixed the problem. >> >> As I continue to address other electrical issues (lights and pumps that >> don't work, rotted speakers, etc.), I'm finding that in most cases, the >> negative wire at the far attachment to the appliance (speaker, pump, light, >> etc.), tends to be corroded. Usually just green on the inside, but still >> usable, but in some cases it is requiring me to splice in a piece of wire a >> few inches away. In one case where there is a light in the closet of the >> forward cabin, I will probably have to rewire with a new light due to the >> wires breaking through. >> >> Is this "normal" corrosion (the boat is in salt water), or is there a >> particular cause for only the ground wire to corrode? Why is it not >> happening on the power wire as well? >> >> Does this indicate other issues I should watch out for? I'm not seeing >> pink discoloration on seacocks, don't see issues on the engine, etc. >> >> Thanks in advance, >> >> Bruce Whitmore >> 1994 C&C 37/40+ >> Madiera Beach, FL >> (847) 404-5092 (mobile) >> bwhitm...@sbcglobal.net >> >> _______________________________________________ >> >> This list is supported by the generous donations of our members. If you >> wish to make a contribution to offset our costs, please go to: >> https://www.paypal.me/stumurray >> >> All Contributions are greatly appreciated! >> >> > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > > -- Joel 301 541 8551
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